<template>
  <div class="goodsinfo-contaner">
    <transition @before-enter="beforeEnter" @enter="enter" @after-enter="afterEnter">
      <div class="ball" v-show="ballFlag" ref="ball"></div>
    </transition>
    <!-- 商品轮播图区 -->
    <div class="mui-card">
      <div class="mui-card-content">
        <div class="mui-card-content-inner">
          <!-- :lunbolist 父组件向子组件传值，需要通过v-bind来绑定一个 绑定的这个数据的名称与 子组件中props中的数据名称保持一致 所以，swiper中的props中的数据也是loubolist-->
          <swiper :lunbolist="lunbotu" :isfull="false"></swiper>
        </div>
      </div>
    </div>

    <div class="mui-card">
      <div class="mui-card-header">{{goodsinfo.title}}</div>
      <div class="mui-card-content">
        <div class="mui-card-content-inner">
          <p class="price">
            市场价:
            <del>${{goodsinfo.market_price}}</del> &nbsp; &nbsp; 销售价：
            <span class="now_price">￥{{goodsinfo.sell_price}}</span>
          </p>
          <p>
            购买数量:
            <numbox @getcount="getSelecterCount" :max="goodsinfo.stock_quantity"></numbox>
          </p>
          <p>
            <mt-button type="primary" size="small">立即购买</mt-button>
            <mt-button type="danger" size="small" @click="addToShopCar">加入购物车</mt-button>
          </p>
        </div>
      </div>
    </div>
    <!-- 商品参数区 -->
    <div class="mui-card">
      <div class="mui-card-header">商品参数</div>
      <div class="mui-card-content">
        <div class="mui-card-content-inner">
          <p>商品货号:{{goodsinfo.goods_no}}</p>
          <p>库存情况:{{goodsinfo.stock_quantity}}件</p>
          <p>上架时间:{{goodsinfo.add_time|dateFomat}}</p>
        </div>
      </div>
      <div class="mui-card-footer">
        <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
        <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
      </div>
    </div>
  </div>
</template>
<script>
import swiper from "../subcomponents/swiper.vue";
import numbox from "../subcomponents/goodsinfo_number.vue";
export default {
  data() {
    return {
      id: this.$route.params.id,
      lunbotu: [],
      goodsinfo: {},
      ballFlag: false,
      seletedCount:1
    };
  },
  created() {
    this.getLunboTU();
    this.getGoodsinfo();
  },
  components: {
    swiper,
    numbox
  },
  methods: {
    getLunboTU() {
      this.$http
        .get("http://www.liulongbin.top:3005/api/getthumimages/" + this.id)
        .then(result => {
          if (result.body.status == 0) {
            result.body.message.forEach(item => {
              item.img = item.src;
            });
            this.lunbotu = result.body.message;
          }
        });
    },
    getGoodsinfo() {
      this.$http
        .get("http://www.liulongbin.top:3005/api/goods/getinfo/" + this.id)
        .then(result => {
          if (result.body.status == 0) {
            this.goodsinfo = result.body.message[0];
          }
        });
    },
    goDesc(id) {
      this.$router.push({ name: "gooddesc", params: { id } });
    },
    goComment(id) {
      this.$router.push({ name: "goodscomment", params: { id } });
    },
    //添加到购物车这个方法要好好理解
    addToShopCar() {
      this.ballFlag = !this.ballFlag;
      var goodsinfoInStore={id:this.id,count:this.seletedCount,price:this.goodsinfo.sell_price,selected:true};
      this.$store.commit('addToCar',goodsinfoInStore);
    },
    beforeEnter(el) {
      el.style.transform = "translate(0,0)";
    },
    enter(el, done) {
      const ballPosition = this.$refs.ball.getBoundingClientRect();
      const badgePosition = document
        .getElementById("badge")
        .getBoundingClientRect();

      const xDistance = badgePosition.left - ballPosition.left;
      const yDistance = badgePosition.top - ballPosition.top;
      el.offsetWidth;
      el.style.transform = `translate(${xDistance}px,${yDistance}px)`;
      el.style.transition = "all .5s cubic-bezier(.4,-0.3,1,.68)";
      done();
    }, 
    afterEnter(el) {
      this.ballFlag = !this.ballFlag;
    },
    getSelecterCount(count){
      // getcount 只是个方法的名称 是传递给子组件的 子组件接收方法要用到这个方法名  仅仅是名字而已，实际的函数调用仍然是 getSelecterCount 形参count就是子组件要传的参数     this.$emit('getcount',parseInt(this.$refs.numbox.value)); 在这里 count就是 this.$refs.numbox.value 
      this.seletedCount=count; 
      console.log('父组件拿到的数据源'+this.seletedCount);
      
    }
  }
};
</script>
<style lang="less" scoped>
.goodsinfo-contaner {
  border-color: #eee;
  overflow: hidden;
  .now_price {
    font-size: 16px;
    font-weight: bold;
    color: red;
  }
  .mui-card-footer {
    display: block;
    button {
      margin: 15px 0;
    }
  }
  .ball {
    height: 15px;
    width: 15px;
    border-radius: 50%;
    background-color: red;
    position: absolute;
    z-index: 99;
    top: 390px;
    left: 146px;
  }
}
</style>